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0.1. GRILLEY, OFNEWHAVEN, CONNECTICUT, assicnon TO THE GRILLEY y COMPANY," P v at... Paton-01%. 66,234, dated Jzdy Z, 1867:,

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TO WHOM IT MAY CONOERN': i .7 v i Be it known that I; G. T. GRILLEY, of New Haven, in the county of New Haven, and, State of Gonnecticnt, have invented certain new and useful improvements in.Capping'Pad-Screws and I hereby declare the following to'be a full, clear, and exact description of the same, reference being had to-the accompanyingldrnwings, in which a i 'Figures 1 and 2 are views of the cap and screw dctached from one anbther ;-and

Figure 3 represents the screw capped and drilled or perforated in accordance with my invention.-

The pad-screw, as is well known, instead of being nicked in the top oriace of. the head like the ordinary screw, has holes bored or drilled in the side of the head, which answer the same purpose as the nick in the. common screw,.and yet admitof the surface or top of the head being presented to the eyeunbroken and unimpaired in appearance. In capping this screw, 1'. a, in applying to the scrcwa metal cap which "is fitted to and closed uponthe head, andserves to both ornament and protect the same fromirust, 31, great difiicnlty is experiencedin finding the holes in the head, which are of course covered and hidden by the cap-blank. All of the various ways dcvised'for finding these holes, either lay-striking the capped head 'lightly witha'mallet or hammer until that part of thecap over the hole is struck 'and depressed, which is the most common: method, or by the employ. ment of otherappliances and machinery which need not be here mentioned, are defective on many accounts.

Not only do theytake up much time and cause a needless exp'cnditurepf labor, but thejvork is not perfectly done, and the cap is often damaged and rendered worthless. It is infact practically impossible to make per feet-screws so long as the hole in the screw is covered by the cap-blank." l i The object of my invention is to overcome this diliicnlty, which I accomplish in the following manner: Instead of perforating the screw-head before the cap is applied to it, the screw-head, as well as the cap, should be blank, 2'. e.,withont hole or perforation. In this-state the two are nnited'tegeth'cr, the cap being closed upon the head by any of the methods now employed for a like purpose. After this has been accomplished, Iproce ed to form the holes in both screw and cap by drilling or'boring through from one side to the otherof the head. By this simple but effective means no time is wasted in vain' attempts to find the hidden hole in the screw-head, and the work'is done well and quickly. The cap isnot injured or defaced, and the tendency of the cap to throw up or separate from the head, which is noticeable at times when the ordinary method of forcing the hole is employed, is effectually prevented. V i

In iigs.'1'and 2 of the drawings, the cap and screw are represented at A and B respectively, separate from each other, and not perforated. While inthis condition the cap isclosed upon screw-head, as shown in fig. 3, and after this the hole a'is formed by boring through from one side to the other of the screwdiead. Any suitable toolmay be used for this purpose, and either one drill may be employed or'two. When one is employed the head is drilled about half way through from one side, and thenithe screw is turned around and the drill is applied at a point on the otherside diametrically opposite that where the hole wasbegnn, so as to perforate the head until it meets withthe other hole. In case two drills are used they work simultaneously frcm opposite sides of the head,.so as to meet in the centre. In all cases, whctheuone or more drills are used, they should work fromthe sides or exterior of the head toward the interior, so as to avoid forcing out the cap .from-the head.

By'my invention I am enabled to economize time and labor. The time consumed in the operation is shortened, as' above explained, and besides'but one operation is requisite where two were before, and I'moreover do a the work more thoroughly and neatly, and produce a better and more perfect capped screw than can" be made by the old methods. v r i j v l l P Having described my invention, and the manner in which the sameis or may be carried into chest, I shall new state my claims, as -follows:

In the'manui'acture of capped pad-screws I claim the method of drilling or perforating the screw-head and cap-blank, after the two have been united together, and at one operation, substan-tial'lyias herein specified. 1 i In testimony whereof I have signed my name to this specification beforetwo subscribing witnesses.

i G. '.l. GRILLEY. Witnesses: Josnrx .SnnLnoN,

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